EP 1492134 B1 20070808 - Magnetic device with improved antiferromagnetically coupling film
Title (en)
Magnetic device with improved antiferromagnetically coupling film
Title (de)
Magnetische Anordnung mit verbesserter Kopplung
Title (fr)
Dispositif magnétique avec un couplage amélioré
Publication
Application
Priority
US 60250403 A 20030624
Abstract (en)
[origin: EP1492134A2] The invention is a magnetic device, i.e., a magnetoresistive sensor or a magnetic tunnel junction device, that has a ferromagnetic structure of two ferromagnetic layers antiferromagnetically coupled together with an improved antiferromagnetically coupling (AFC) film. The AFC film is an alloy of Ru 100-x Fe x where x is between approximately 10 and 60 atomic percent. This AFC film increases the exchange coupling by up to a factor or two and has an hcp crystalline structure making it compatible with Co alloy ferromagnetic layers.
[origin: EP1492134A2] The device has two ferromagnetic films antiferromagnetically coupled to one another by an antiferromagnetically coupling film located between the ferromagnetic films. The coupling film is formed of a ruthenium-iron alloy and has a hexagonal-close-packed crystalline structure. One of the ferromagnetic films is formed over underlayers and below the coupling film and other ferromagnetic film is formed over the coupling film. Independent claims are also included for the following: (a) a magnetoresitive spin valve sensor (b) a magnetic tunnel junction device.
IPC 8 full level
H01F 10/32 (2006.01); C22C 38/00 (2006.01); G01R 33/09 (2006.01); G11B 5/39 (2006.01); G11B 5/66 (2006.01); G11C 11/15 (2006.01); H01F 10/16 (2006.01); H01L 43/08 (2006.01); H01L 43/10 (2006.01); G11B 5/00 (2006.01)
CPC (source: EP KR US)
B82Y 10/00 (2013.01 - EP US); B82Y 25/00 (2013.01 - EP US); G01R 33/093 (2013.01 - EP US); G11B 5/39 (2013.01 - KR); G11B 5/3903 (2013.01 - EP US); G11B 5/3909 (2013.01 - EP US); G11C 11/15 (2013.01 - EP US); H01F 10/324 (2013.01 - EP US); H10N 50/85 (2023.02 - EP US); G11B 2005/001 (2013.01 - EP US); Y10T 428/12875 (2015.01 - EP US); Y10T 428/12931 (2015.01 - EP US); Y10T 428/2495 (2015.01 - EP US)
Designated contracting state (EPC)
DE FR GB
DOCDB simple family (publication)
EP 1492134 A2 20041229; EP 1492134 A3 20060315; EP 1492134 B1 20070808; CN 1573946 A 20050202; DE 602004007986 D1 20070920; DE 602004007986 T2 20080430; JP 2005019990 A 20050120; KR 20050001361 A 20050106; MY 134560 A 20071231; SG 117500 A1 20051229; TW 200501084 A 20050101; US 2004262627 A1 20041230; US 6893741 B2 20050517
DOCDB simple family (application)
EP 04253703 A 20040621; CN 200410061669 A 20040623; DE 602004007986 T 20040621; JP 2004180612 A 20040618; KR 20040046920 A 20040623; MY PI20042412 A 20040621; SG 200403847 A 20040623; TW 93114545 A 20040521; US 60250403 A 20030624